Convert MP4 to WebM

Free, private and unlimited. Your file never leaves your device.

Drop your MP4 file hereor click to choose a file

WebM is the open, royalty-free video format built for the web: smaller files that embed cleanly in HTML5 pages. Convert MP4 to WebM (VP8 + Vorbis) directly in your browser.

How to convert MP4 to WebM

  1. Click the box above (or drag & drop) to select your MP4 file.
  2. Press “Convert to WebM”. The conversion runs right in your browser.
  3. Download your WebM file. That’s it: no signup, no watermark.

Why use this converter?

Frequently asked questions

Is this MP4 to WebM converter really free?

Yes. It is completely free with no signup, no watermarks and no conversion limits.

Are my files uploaded to a server?

No. The converter uses WebAssembly to run FFmpeg inside your browser, so your MP4 file never leaves your device. That also means there is nothing for us to store or share.

Is there a file size limit?

There is no artificial limit. Because everything runs in your browser’s memory, very large files (over ~1.5 GB) may fail depending on your device.

Do I need to install any software?

No. Everything works in your browser, desktop or mobile. There is nothing to download or install.

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